A London-based writer has illustrated how easy it is to manipulate review sites like TripAdvisor, by pushing an entirely nonexistent restaurant to the top spot in all of London.
Vice writer Oobah Butler – who also recently impersonated a designer for Paris Fashion Week – already had a bit of experience with gaming review sites, having previously been paid to write fake reviews by a shady PR service.
That inspired him to create The Shed at Dulwich, which was, literally, the backyard cottage he calls home. Butler set up an account for his “restaurant” using a cheap disposable phone, and simply didn’t provide an address, saying it was appointment only. That simultaneously deflected inquisitive debunkers, and created an air of exclusivity that was key to the eventual triumph of his fakery.
He also faked photos of The Shed’s food, somehow making shaving cream, bleach tablets, and his own feet into very convincing mockups of gourmet dishes. Then he recruited friends and allies to write glowing fake reviews, each of them unique and posted from different computers to help defeat TripAdvisor’s fraud detection systems.
Things quickly got, in Butler’s words, “a little out of hand.” From the very bottom of TripAdvisor’s charts, his fake restaurant steadily climbed the London rankings. He started getting emails and phone calls requesting nonexistent reservation spots, with interest only amping up when he told callers The Shed was “fully booked for the next six weeks.”
Get Data Sheet, Fortune’s technology newsletter.
Even stranger, food suppliers started guessing the Shed’s address and sending him free samples, and job applications started rolling in. PR companies even contacted him to offer their services — all without Butler serving a single meal.
Somehow, the momentum carried The Shed at Dulwich to the top of TripAdvisor’s charts, making Butler’s fake eatery the top-rated restaurant in London. According to Butler, The Shed held on to that ranking for two weeks.
Butler finally decided to take his stunt to its obvious conclusion by cleaning up his yard, inviting a handful of guests over, and serving them frozen dinners straight from the grocery store. Some of The Shed’s guests apparently saw through the ruse, but most, according to Butler, enthusiastically bought in to what seems to have been a genuinely unique experience, with some even immediately requesting to rebook.
TripAdvisor, responding to Butler’s stunt, argued that it didn’t prove much, since there’s little real-world incentive for anyone to create a fake restaurant. But that misses the larger point: even as we rely more and more on the internet for information, a lot of that information can’t be trusted.
There has been plenty of evidence over the years of concerted efforts to manipulate review sites, including not just TripAdvisor but also Yelp, and even the car dealership guide on Edmunds.com. There’s no evidence that these sites are complicit in the fakery; it hurts them as much as anyone, but just as with fake news on Facebook and Russian bots on Twitter, it’s obviously hard to stop.
We’ve reached out to TripAdvisor for further comment on the renowned shed, and will update with any response.